/Engine/Source/Runtime/Engine/Public/ISMPartition/ISMPartitionInstanceManager.h
Attempt to delete the given client ISM instances.
True if any instances were deleted, false otherwise.
bool DeleteISMPartitionInstances ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FISMClientInstanceId](API\Runtime\Engine\ISMPartition\FISMClientInstanceId) > InstanceIds )